It is Christina Aguilerra. It's the cover of her newest single.
All of those celebrities are photoshopped to every inch of their anatomy. Mariah Carey, whose body was far from perfect during her "chubby stage," looked like she weighed 80 pounds in one of her album covers. Please. We know they aren't perfect, and you know what? That is fine with us.

HAHAHA I am lovin this! If only America could be that bold and honest. They aren't perfect, so stop making them look like they are! It's confusing our young girls into thinking they need to look like that.